China Electric Power Research Institute, Beijing 100192, China

From 2016 to 2023, eleven significant outage accidents related to the renewable energy occurred in the United States, Australia, and the United Kingdom, which posed severe threats to the secure and stable operation of power grids. The basic situation of these accidents are introduced, and their instability process characteristics, and mechanism are summarized and analyzed. It identifies the insufficient system strength, irrational renewable energy control strategies, and a lack of unanticipated fault prevention measures as the primary reasons for these accidents. Finally, combined with the reality of the power grids in China, some recommendations are proposed to ensure the secure and stable operation of the new power systems.

This work is supported by National Natural Science Foundation of China-State Grid Joint Fund for Smart Grid (No. U2166601) and National Natural Science Foundation of China (No. 51977197).